2018/02/20 by Achille Nucita, A. A. Nucita, D. Licchelli +8 · 2 citations
Physics and Astronomy · #Astro and Planetary Science #Astrobiology #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Earth (classical element) #Event (particle physics) #Exoplanet #Gravitational microlensing #Physics #Planet #Planetary system #Stars #Stellar, planetary, and galactic studies #Super-Earth #astro-ph.EP
paper · pdf · doi:10.1093/mnras/sty448
Accepted for publication on MNRAS, 2018. 6 Pages, 5 Figures. References updated
arxiv created 2018/02/20 · openalex publication_date 2018/02/20 · openalex created_date 2018/03/06 · arxiv updated 2018/03/14 · openalex updated_date 2026/08/05
The transient event labelled as TCP J05074264+2447555 recently discovered towards the Taurus region was quickly recognized to be an ongoing microlensing event on a source located at distance of only 700–800 pc from Earth. Here, we show that observations with high sampling rate close to the time of maximum magnification revealed features that imply the presence of a binary lens system with very low-mass ratio components. We present a complete description of the binary lens system, which host an Earth-like planet with most likely mass of 9.2 ± 6.6 M⊕. Furthermore, the source estimated location and detailed Monte Carlo simulations allowed us to classify the event as due to the closest lens system, being at a distance of ≃380 pc and mass ≃0.25 M⊙.